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ADS1194

更新时间： 2024-11-05 08:19:47
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德州仪器 - TI /
页数 文件大小 规格书
75页 963K
描述
Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements

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ADS1194 数据手册

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ADS1294  
ADS1296  
ADS1298  
www.ti.com  
SBAS459D –JANUARY 2010–REVISED MAY 2010  
Low-Power, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements  
Check for Samples: ADS1294, ADS1296, ADS1298  
With its high levels of integration and exceptional  
1
FEATURES  
performance, the ADS1294/6/8 family enables the  
creation of scalable medical instrumentation systems  
at significantly reduced size, power, and overall cost.  
23  
•
Eight Low-Noise PGAs and  
Eight High-Resolution ADCs (ADS1298)  
•
•
•
•
•
•
•
Low Power: 0.75mW/channel  
Input-Referred Noise: 4mVPP (150Hz BW, G = 6)  
Input Bias Current: 200pA  
The ADS1294/6/8 have a flexible input multiplexer  
per channel that can be independently connected to  
the internally-generated signals for test, temperature,  
and lead-off detection. Additionally, any configuration  
of input channels can be selected for derivation of the  
right leg drive (RLD) output signal. The ADS1294/6/8  
operate at data rates as high as 32kSPS, thereby  
allowing the implementation of software pace  
detection. Lead-off detection can be implemented  
internal to the device, either with a pull-up/pull-down  
resistor or an excitation current sink/source. Three  
integrated amplifiers generate the Wilson Central  
Terminal (WCT) and the Goldberger Central  
Terminals (GCT) required for a standard 12-lead  
ECG.  
Data Rate: 250SPS to 32kSPS  
CMRR: –115dB  
Programmable Gain: 1, 2, 3, 4, 6, 8, or 12  
Supplies: Unipolar or Bipolar  
–
–
Analog: 2.7V to 5.25V  
Digital: 1.65V to 3.6V  
•
Built-In Right Leg Drive Amplifier, Lead-Off  
Detection, WCT, Test Signals  
•
•
•
•
•
•
Pace Detection  
Digital Pace Detection Capability  
Built-In Oscillator and Reference  
Flexible Power-Down, Standby Mode  
SPI™-Compatible Serial Interface  
Multiple ADS1294/6/8 devices can be cascaded in  
high channel count systems in  
configuration.  
a
daisy-chain  
Package options include a tiny 8mm × 8mm, 64-ball  
BGA and a TQFP-64. Both packages are specified  
from 0°C to +70°C (–40°C to +85°C for TQFP  
industrial grade version available soon).  
Operating Temperature Range: 0°C to +70°C  
(–40°C to +85°C grade available soon)  
APPLICATIONS  
REF  
•
Medical Instrumentation (ECG and EEG)  
including:  
Test Signals and  
Monitors  
Reference  
ADC1  
ADC2  
ADC3  
ADC4  
ADC5  
ADC6  
ADC7  
ADC8  
SPI  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
A8  
–
–
Patient monitoring; Holter, event, stress,  
and vital signs ECG, AED, telemedicine,  
fetal ECG  
Bispectral index (BIS), Evoked audio  
potential (EAP), Sleep study monitor  
Oscillator  
MUX  
•
High-Precision, Simultaneous, Multichannel  
Signal Acquisition  
Control  
DESCRIPTION  
The ADS1294/6/8 are a family of multichannel,  
simultaneous sampling, 24-bit, delta-sigma (ΔΣ)  
analog-to-digital converters (ADCs) with a built-in  
programmable gain amplifier (PGA), internal  
reference, and an onboard oscillator. The  
ADS1294/6/8 incorporate all of the features that are  
commonly required in medical electrocardiogram  
(ECG) and electroencephalogram (EEG) applications.  
To Channel  
RESP  
Wilson  
Terminal  
WCT  
¼
¼
¼
RLD  
PACE  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
SPI is a trademark of Motorola.  
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2010, Texas Instruments Incorporated  
1234567...75

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